The answer to the first part of the question is "yes." The answer to the second part is a little more nebulous; I'm not sure that this has actually been shown. It is undeniable that various hormones used in Birth Control pills are detectable in the water supplies of at least some locations, though.
Hormones control the release of eggs, and Birth Control pills either regulate or prevent that release.
Hormones control the release of an egg
Birth control patch
Birth control pills have hormones because hormones are the chemicals that affect ovulation and other aspects of fertility in the female body.
Birth control is what is used to prevent unintended pregnancy, there are multiple different types of birth control that work in different ways, it is ignorant to say 'birth control' to mean one specific type of birth control. Without knowing what type of birth control you're referring to we cannot answer your question - some birth control does absolutely nothing to your hormones, some birth control completely shuts down your hormones.
If he is taking female birth control pills forget him. They contain hormones and he is not taking them for birth control.
Yes, the birth control patch is a hormonal method
"the pill".
Birth control hormones are likely to keep endometriosis from getting worse. If you have severe symptoms or if birth control hormones and NSAIDs don't work, you might try a stronger hormone therapy.
no. birth control stimulates your hormones so you do not ovulate while having sex.
Every birth control works different for each woman. There are many different combinations of hormones. Any change in hormones could make your body act different. Sometimes you have to see what birth control works best for you.
no, the birth control pill contains hormones which prevent hair growth in women.